Leyawiin is a Cyrodiilic city in the extreme southeast of the province, by the mouth of the Niben River where it opens into Topal Bay. Located on the small strip of land between the provinces of Elsweyr and Black Marsh, the recently ceded Trans-Niben, it has a sizable population that includes many Khajiit and Argonians. Marius Caro is the Count of Leyawiin. Land in County Leyawiin was annexed into Cyrodiil due to an agreement between the Mane and the Empire. The Renrijra Krin, a group of bandits and freedom fighters, prime objective is to reclaim all parts of Cyrodiil that they believe rightfully belong to Elsweyr.

Leyawiin straddles a swampy estuary of the Niben River. It is roughly divided into four districts: Chapel District, Guild Plaza, Main Street and Castle Leyawiin.